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United States Patent | 6,016,326 |
Claisse ,   et al. | January 18, 2000 |
A method for biasing a semiconductor laser (12) at the threshold level of the semiconductor laser (12). The method includes applying pilot tone signals having the same frequency to a bias current and a drive current of the semiconductor laser (12). A lateral detector (13) generates a photocurrent from spontaneous emissions of the semiconductor laser (12). Further, the method includes biasing the semiconductor laser (12) using a pilot tone signal of the photocurrent.
Inventors: | Claisse; Paul Robert (Gilbert, AZ); Kiely; Philip Anthony (Gilbert, AZ) |
Assignee: | Motorola, Inc. (Schaumburg, IL) |
Appl. No.: | 990267 |
Filed: | December 15, 1997 |
Current U.S. Class: | 372/44.011; 372/26; 372/28; 372/29.01; 372/29.015; 372/32; 372/46.01 |
Intern'l Class: | H01S 003/19 |
Field of Search: | 372/20,25,26,28,29,32,33,38,43,44,45,46,50 |
4385387 | May., 1983 | Trimmel | 372/29. |
4504976 | Mar., 1985 | Beaudet | 372/31. |
4698817 | Oct., 1987 | Burley | 372/31. |
4918396 | Apr., 1990 | Halemane et al. | 372/31. |
4995045 | Feb., 1991 | Burley et al. | 372/38. |
5187713 | Feb., 1993 | Kwa | 372/26. |
5809049 | Sep., 1998 | Schaefer et al. | 372/38. |
5850409 | Dec., 1998 | Link | 372/38. |
"Microcavity Vacuum-Field Configuration and the Spontaneous Emission Power"by T. Zhang, J.G. Wohlbier, Kent D. Choquette, and N. Tabatabaie, IEEE Journal of Selected Topics in Quantum Electronics, vol. 1, No. 2, Jun. 1995, pp. 606-615. "Optische Betriebssysteme fur den Weitverkehr"by Horst Kleinmann, Ernst Kremers, Ralf-Michael Stach, Friedrich-Christian Tischer, ANT Nachrichtentechnische Berichte Heft, Dec. 3, 1986, pp. 95-112. "Monolithisch integrierte Bausteine fur Systeme der optischen Nachrichtentechnik"by Wolfgang Bambach, Gerd Muhlnikel, Bernhard Schwaderer, Horst Wernz, Theodor Wiesmann, ANT Nachrichtentechnische Berichte Heft, May 4, 1987, pp. 42-47. |